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WO2001088574A1 - Lame compensatrice optique, plaque polarisante et afficheur a cristaux liquides - Google Patents

Lame compensatrice optique, plaque polarisante et afficheur a cristaux liquides Download PDF

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Publication number
WO2001088574A1
WO2001088574A1 PCT/JP2001/004041 JP0104041W WO0188574A1 WO 2001088574 A1 WO2001088574 A1 WO 2001088574A1 JP 0104041 W JP0104041 W JP 0104041W WO 0188574 A1 WO0188574 A1 WO 0188574A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
cellulose acetate
liquid crystal
mass
acetate film
Prior art date
Application number
PCT/JP2001/004041
Other languages
English (en)
Japanese (ja)
Inventor
Yoji Ito
Masataka Ogawa
Original Assignee
Fuji Photo Film Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2000265651A external-priority patent/JP2002071948A/ja
Priority claimed from JP2000287403A external-priority patent/JP2002098832A/ja
Application filed by Fuji Photo Film Co., Ltd. filed Critical Fuji Photo Film Co., Ltd.
Priority to KR1020027015302A priority Critical patent/KR100807139B1/ko
Priority to US10/276,258 priority patent/US7084944B2/en
Priority to EP01930158A priority patent/EP1300701A4/fr
Priority to AU2001256749A priority patent/AU2001256749A1/en
Publication of WO2001088574A1 publication Critical patent/WO2001088574A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition

Definitions

  • optical compensation sheets for liquid crystal display devices are required to have optical anisotropy (high retardation value). Therefore, as the optical compensation sheet, a synthetic polymer film having a high retardation value such as a polycarbonate film or a polysulfone film (specifically, a stretched birefringent film obtained by stretching a synthetic polymer film) is used. It is common to use.
  • optical compensation sheet having an optically anisotropic layer containing a discotic compound on a transparent support, instead of the stretched birefringent film.
  • the optically anisotropic layer is formed by orienting a discotic compound and fixing the orientation state.
  • Discotic compounds generally have large birefringence.
  • discotic compounds have various orientations. Therefore, by using a discotic compound, an optical compensatory sheet having optical properties that cannot be obtained with a conventional stretched birefringent film can be produced.
  • the optical compensatory sheet using the discotic compound is described in JP-A-6-214116, US Pat. Nos. 5,583,679 and 5,646,703, and West German Patent Publication 391 162 OA1.
  • Japanese Patent Application Laid-Open No. 1986/1986 discloses that an elliptically polarizing plate having an optical compensatory sheet on one side of a polarizing film and a protective film on the other side can be used without increasing the thickness of the liquid crystal display device. There is a description that contrast can be increased.
  • a phase difference is easily generated due to distortion such as heat. This phase difference caused a frame-like increase in light transmittance (light leakage) on the display screen during black display of the liquid crystal display device, indicating that there was a problem in durability.
  • Japanese Patent Application Laid-Open No. 7-191127 and European Patent No. 0 911 656 A2 disclose discotic (disc-shaped) on a transparent support.
  • the use of an optically compensatory sheet coated with an optically anisotropic layer made of a compound directly as a protective film for a polarizing plate solves the above-mentioned problem of durability without increasing the thickness of the liquid crystal display device.
  • Still another object of the present invention is to provide a liquid crystal display device (particularly, an OCB mode liquid crystal cell) which is optically compensated by an optical compensation sheet and has no light leakage problem.
  • the present invention relates to a cellulose acetate having an acetylation degree of 59.0 to 61.5%, and an aromatic compound having at least two aromatic rings with respect to 100 parts by mass of cellulose acetate.
  • An optical compensatory sheet having a cellulose acetate film containing 0.01 to 20 parts by mass, wherein the cellulose ester finolem has a Re retardation value (R e 550) force measured at a wavelength of 550 nm of SO to 200 nm.
  • the Rth retardation value (Rth550) of the cellulose acetate film measured at a wavelength of 550 nm is in the range of 0 to 400 nm, and the thickness of the cellulose acetate film is in the range of 10 to 70 // m.
  • An optical compensation sheet is provided.
  • the Re retardation value and Rth retardation value of the film are defined by the following formulas (I) and (II), respectively.
  • the optical compensation sheet (No.4 plate) that can achieve LZ4 in a wide wavelength range using a single cellulose acetate film has been obtained, while strictly adjusting the angle of two conventional polymer films. The step of stacking is no longer required.
  • substantially parallel means that the angle is within a range of less than ⁇ 5 ° from a strict angle. This range is preferably less than ⁇ 4 °, ⁇ 3. Is more preferably less than ⁇ 2 °.
  • slow axis J means the direction in which the refractive index is maximum
  • transmission axis means the direction in which the transmittance is maximum.
  • FIG. 7 is a conceptual diagram showing the relationship of optical compensation in a bend alignment type liquid crystal display device.
  • Aromatic heterocycles are generally unsaturated heterocycles.
  • the aromatic hetero ring is preferably a 5-, 6-, or 7-membered ring, and more preferably a 5- or 6-membered ring.
  • Aromatic heterocycles generally have the most double bonds.
  • As the hetero atom a nitrogen atom, an oxygen atom and a sulfur atom are preferable, and a nitrogen atom is particularly preferable.
  • the aromatic ring connecting group may have a substituent.
  • the boiling point of the retardation raising agent is preferably 260 ° C. or higher.
  • the boiling point is measured by a commercially available measuring device (for example, TGZDTA100, manufactured by Seiko Electronics Industries, Ltd.)
  • the organic solvent Cellulose acetate dissolves in it.
  • the temperature may be raised simply by leaving it at room temperature or may be heated in a warm bath.
  • a plasticizer can be added to the cellulose acetate film in order to improve mechanical properties or to increase a drying speed.
  • a plasticizer a phosphoric acid ester or a carboxylic acid ester is used.
  • phosphate esters include triphenylenophosphate (TPP) and tricresyl phosphate (TCP)
  • divalent group residue examples include, for example, the following formulas.
  • the thermal conductivity of the cellulose acetate film is preferably at least i wZ (m ⁇ K).
  • the amount of the residual solvent with respect to the cellulose acetate film is preferably in the range of 0.01 to 1% by mass, more preferably in the range of 0.02 to 0.07% by mass, 0. 0 3 to 0. and most preferably in the range of 0 5 mass 0/0.
  • the optical compensatory sheet is used as a transparent protective film of a polarizing plate, it is particularly preferable to subject the cellulose acetate film to an acid treatment or an alkali treatment, that is, a hydrophilization treatment, from the viewpoint of adhesion to the polarizing film.
  • the alkaline metal is preferably a hydroxide of an alkaline metal such as sodium hydroxide or lithium hydroxide.
  • the pH of the aqueous solution is preferably 10 or more. It is preferable to carry out the alkali treatment by immersing at least the surface of the cellulose acetate film on the polarizing film side in an aqueous alkali solution, but both surfaces may be subjected to an alkali treatment.
  • the immersion time is preferably 1 to 300 seconds, more preferably 5 to 240 seconds.
  • the treatment temperature is preferably from 25 to 70 ° C, more preferably from 35 to 60 ° C. After completion of the immersion, the cellulose acetate film is preferably washed with water.
  • the coating method examples include a spin coating method, a dip coating method, a curtain coating method, an extra-noise coating method, a no coating method, and an E-type coating method.
  • the E-type coating method is particularly preferable.
  • the thickness of the alignment film is preferably in the range of 0.1 to 1 O ⁇ m.
  • Heat drying can be performed at a heating temperature in the range of 20 to 110 ° C. In order to form sufficient crosslinking, the heating temperature is preferably in the range of 60 to 100 ° C, and more preferably in the range of 80 to 100 ° C. Drying time can be 1 minute to 36 hours. Preferably, it is 5 to 30 minutes.
  • the pH is also preferably set to an optimum value for the cross-linking agent to be used. When dartartaldehyde is used, the pH is preferably in the range of 4.5 to 5.5, and particularly preferably PH5. No.
  • the polarizing plate includes a polarizing film and two transparent protective films disposed on both sides of the polarizing film.
  • a protective film an optical compensation sheet comprising the above-mentioned cellulose acetate film or an optical compensation sheet comprising an optically anisotropic layer provided on a cellulose acetate film can be used.
  • An ordinary cellulose acetate film may be used for the other protective film.
  • a transparent protective film on the surface of the polarizing film opposite to the surface 4.
  • An ordinary cellulose acetate film may be used as the transparent protective film.
  • the optical compensatory sheet or the polarizing plate obtained by laminating the optical compensatory sheet and the polarizing film are particularly advantageously used for a transmission type liquid crystal display device and a reflection type liquid crystal display device.
  • An appropriate value is determined for the retardation of the optically anisotropic cellulose acetate film depending on the characteristics of the liquid crystal display device.
  • the liquid crystal layer (17) is composed of a mixture of liquid crystal and dichroic dye.
  • the liquid crystal layer contains a mixture of liquid crystal and a dichroic dye in the cell gap formed by the spacer (24). Is obtained.
  • the elliptically polarizing plate of the embodiment described in b1 of FIG. 9 has an optically anisotropic layer 2 (133), an optically anisotropic layer 1 (131) and a polarizing film (134) laminated in this order.
  • the angle between the rubbing direction (RD) of the discotic compound and the slow axis (SA) of the optically anisotropic layer 2 (133) is substantially 45 °, and the retardation of the optically anisotropic layer 2 (133) is The axis (SA) and the transmission axis (TA) of the polarizing film (134) are substantially parallel.
  • the alignment film is formed by rubbing an organic compound (preferably a polymer), obliquely depositing an inorganic compound, forming a layer having microgroups, or an organic compound (eg, ⁇ -tricosanoic acid) by a Langmuir's method (LB film). , Dioctadecinole methylascidium chloride, methyl stearylate). Further, there is known an alignment film in which an alignment function is generated by application of an electric field, a magnetic field, or light irradiation. The alignment film is preferably formed by rubbing a polymer. Polyvinyl alcohol is a preferred polymer. Modified polyvinyl alcohol to which a hydrophobic group is bonded is particularly preferred.
  • Example 5 The transmission axis of the polarizing film and the slow axis of KH-01 (optical compensation sheet) prepared in Example 1 were arranged so as to be parallel. The transmission axis of the polarizing film and the slow axis of the commercially available cellulose triacetate film were arranged so as to be orthogonal to each other. Thus, a polarizing plate was produced. [Example 5]
  • a pair of polarizers provided in a 15-inch liquid crystal display device (VL-1530 SW, manufactured by Fujitsu Ltd.) using a vertical alignment type liquid crystal cell was peeled off, and the polarizer prepared in Example 4 was used instead. Then, the optical compensation sheet was attached to the viewer side and the backlight side via an adhesive so that the optical compensation sheet was on the liquid crystal cell side.
  • the transmission axis of the polarizing plate on the observer side and the transmission axis of the polarizing plate on the backlight side were arranged to be orthogonal to each other.
  • the coating solution was applied with a # 3 $ wire bar. This was heated in a constant temperature zone of 130 ° C. for 2 minutes to orient the discotic compound. Next, UV irradiation was performed for 1 minute using a 12 OWZ cm high-pressure mercury lamp under an atmosphere of 60 ° C to polymerize the discotic compound. Then, it was left to cool to room temperature. Thus, an optically anisotropic layer was formed, and an optical compensation sheet (KH-15) was produced.
  • KH-15 optical compensation sheet
  • optical compensation sheet (KH-17) was transparent, had no alignment defects, and had a uniform film thickness (1.55 / m).
  • the transmission axis of the polarizing film and the slow axis of the optical compensation sheet (KH-04) were arranged in parallel. Thus, a polarizing plate was produced.
  • Example 17 Peel off a pair of polarizers provided in a 20-inch liquid crystal display device using a TN type liquid crystal cell (LC-20V1, manufactured by Sharp Corporation), and manufacture it in Example 17 instead.
  • the thus-obtained polarizing plates were attached one by one to the observer side and the backlight side via an adhesive so that the optical compensation sheet was on the liquid crystal cell side.
  • the transmission axis of the polarizing plate on the observer side and the transmission axis of the polarizing plate on the backlight side were arranged so as to be orthogonal to each other.
  • a dope is prepared by mixing 56 parts by mass of the retardation enhancer solution with 474 parts by mass of the cellulose acetate solution to prepare a dope (100 parts by mass of the cellulose acetate is added to 7.8 parts by mass of the retardation enhancer.
  • a cellulose acetate film (optical compensation sheet) was produced in the same manner as in Example 22 except that the stretching ratio was changed to 14%.
  • a polarizing plate was produced in the same manner as in Example 26 except that the cellulose acetate film produced in Example 24 was used.
  • Iodine was adsorbed on the stretched polyvinyl alcohol film to produce a polarizing film, and the cellulose acetate film produced in Comparative Example 10 was attached to one side of the polarizing film using a polyvinyl alcohol-based adhesive.
  • the transmission axis of the polarizing film was arranged perpendicular to the slow axis of the cellulose acetate film (CAF-HI).
  • a commercially available cellulose triacetate film (Fujitac TD80UF, manufactured by Fuji Shashin Film Co., Ltd.) was saponified, and was attached to the opposite side of the polarizing film using a polyvinyl alcohol-based adhesive. Thus, a polarizing plate was produced.
  • a pair of polarizing plates provided on a liquid crystal display device (6E-A3, manufactured by Sharp Corporation) using a TN type liquid crystal cell was peeled off, and the polarizing plate prepared in Example 37 was replaced with an optical compensation sheet ( The sheets were adhered one by one to the viewer side and the backlight side via an adhesive so that KH-A2) became the liquid crystal cell side.
  • the transmission axis of the polarizing plate on the observer side and the transmission axis of the polarizing plate on the packlight side were arranged so as to be orthogonal to each other.
  • the viewing angle of the prepared liquid crystal display device was measured in eight steps from black display (L1) to white display (L8) using a measuring device (EZ-Contrast 160D, manufactured by ELD IM). The results are shown in Table 14. '
  • Table 14 B says viewing angle (range where the contrast ratio is 10 or more and there is no gradation inversion on the black side)
  • a pair of polarizing plates provided on a 20-inch liquid crystal display device using a TN type liquid crystal cell (LC-20V1, manufactured by Sharp Corporation) was peeled off, and the polarizing plate manufactured in Example 36 was replaced with the polarizing plate manufactured in Example 36.
  • the optical compensation sheet (KH-A1) was attached one by one to the observer side and the packlight side via an adhesive so that it was on the liquid crystal cell side.
  • the transmission axis of the polarizing plate on the observer side and the transmission axis of the polarizing plate on the backlight side were arranged so as to be orthogonal to each other.
  • a polarizing plate was produced in the same manner as in Example 46, except that the optically compensatory sheet T AC-1 not subjected to the aging treatment produced in Example 45 was used.
  • the obtained dope was cast on a film forming band, dried at room temperature for 1 minute, and then dried at 45 ° C for 5 minutes.
  • the residual solvent amount after drying was 30% by mass.
  • the cellulose acetate film was peeled off from the band, dried at 120 ° C for 5 minutes, and stretched at 130 ° C in the casting direction and 45 ° direction by about 50%. After stretching, the film was dried at 130 ° C for 20 minutes, and then the stretched film was taken out.
  • the residual solvent amount after stretching is 0.1 mass. /. Met.
  • a glass substrate provided with an ITO transparent electrode and a glass substrate provided with a flat aluminum reflective electrode were prepared.
  • a polyimide alignment film (SE-610, manufactured by Nissan Chemical Industries, Ltd.) was formed on the electrode side of the glass substrate provided with the ITO transparent electrode, and rubbing was performed.
  • a vertical alignment film (SE-1211, manufactured by Nissan Chemical Industries, Ltd.) was formed on the electrode side of a glass substrate provided with an aluminum reflective electrode. No rubbing treatment was performed on the alignment film on the aluminum reflective electrode.
  • Two substrates were stacked via a 4.0 / zm spacer so that the orientation films faced each other.
  • Liquid crystal (ZLI-1565, manufactured by Merck) was injected into the gap between the substrates to form a liquid crystal layer.
  • a HAN type liquid crystal cell having a value of ⁇ d of 519 nm was produced.
  • the Re retardation value (Re 550) measured at a wavelength of 550 nm was 0.6 nm, and the Rth retardation value (Rth550) was 35 nm.
  • a voltage of 5 or 5.5 V was applied to the bend-aligned liquid crystal cell with a 55 Hz rectangular wave, and the Re retardation value was measured at wavelengths of 436 nm, 546 nm and 611.5 nm.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polarising Elements (AREA)

Abstract

L'invention concerne une lame compensatrice optique comprenant un film en acétate de cellulose constitué de 100 parties en poids d'acétate de cellulose possédant un degré d'acétylation compris entre 59 et 61,5 % et de 0,01 à 20 parties en poids d'un composé aromatique contenant au moins deux noyaux aromatiques, caractérisée en ce que le film en acétate de cellulose présente un retard optique Re compris entre 0 et 200 nm, un retard optique Rth compris entre 70 et 400 nm, et une épaisseur comprise entre 10 et 70 νm. Cette lame compensatrice est utilisée dans les afficheurs à cristaux liquides.
PCT/JP2001/004041 2000-05-15 2001-05-15 Lame compensatrice optique, plaque polarisante et afficheur a cristaux liquides WO2001088574A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020027015302A KR100807139B1 (ko) 2000-05-15 2001-05-15 광학 보상 시트, 편광판, 및 액정 표시 장치
US10/276,258 US7084944B2 (en) 2000-05-15 2001-05-15 Optical compensatory sheet comprising a biaxially stretched cellulose acetate film, polarizing plate and liquid crystal display
EP01930158A EP1300701A4 (fr) 2000-05-15 2001-05-15 Lame compensatrice optique, plaque polarisante et afficheur a cristaux liquides
AU2001256749A AU2001256749A1 (en) 2000-05-15 2001-05-15 Optical compensating sheet, polarizing plate, and liquid-crystal display

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
JP2000-141485 2000-05-15
JP2000141485 2000-05-15
JP2000-185810 2000-06-21
JP2000185810 2000-06-21
JP2000-251188 2000-08-22
JP2000251188 2000-08-22
JP2000265651A JP2002071948A (ja) 2000-09-01 2000-09-01 位相差板および円偏光板
JP2000-265651 2000-09-01
JP2000283525 2000-09-19
JP2000-283525 2000-09-19
JP2000287403A JP2002098832A (ja) 2000-09-21 2000-09-21 光学補償シート、偏光板およびそれを用いた液晶表示装置
JP2000-287403 2000-09-21

Publications (1)

Publication Number Publication Date
WO2001088574A1 true WO2001088574A1 (fr) 2001-11-22

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PCT/JP2001/004041 WO2001088574A1 (fr) 2000-05-15 2001-05-15 Lame compensatrice optique, plaque polarisante et afficheur a cristaux liquides

Country Status (6)

Country Link
US (1) US7084944B2 (fr)
EP (1) EP1300701A4 (fr)
KR (1) KR100807139B1 (fr)
CN (1) CN1209638C (fr)
AU (1) AU2001256749A1 (fr)
WO (1) WO2001088574A1 (fr)

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WO2003076985A1 (fr) * 2002-03-13 2003-09-18 Fuji Photo Film Co., Ltd. Film de correction optique, plaque de polarisation et dispositif servant a afficher des images (lcd)
WO2004038477A1 (fr) * 2002-10-24 2004-05-06 Fuji Photo Film Co., Ltd. Procede de production de films d'acylate de cellulose
WO2004041925A1 (fr) * 2002-11-08 2004-05-21 Nippon Kayaku Kabushiki Kaisha Composition pour compose a cristaux liquides et film retardant optique l'utilisant
JP2004191865A (ja) * 2002-12-13 2004-07-08 Fuji Photo Film Co Ltd 偏光板および液晶表示装置
WO2004072701A1 (fr) * 2003-02-12 2004-08-26 3M Innovative Properties Company Film optique polymere
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US7239362B2 (en) * 2002-11-08 2007-07-03 Seiko Epson Corporation Liquid crystal display device and electronic apparatus having two elliptically polarizing plates
US7405784B2 (en) 2003-02-12 2008-07-29 3M Innovative Properties Company Compensators for liquid crystal displays with biaxially stretched single film with crystallization modifier
EP2293122A2 (fr) 2009-08-28 2011-03-09 Fujifilm Corporation Film polarisant, stratifié et dispositif d'affichage à cristaux liquides
WO2011030883A1 (fr) 2009-09-14 2011-03-17 Fujifilm Corporation Filtre de couleur et élément d'affichage émetteur de lumière
WO2011125620A1 (fr) 2010-03-31 2011-10-13 富士フイルム株式会社 Composé cristallin liquide, composition cristalline liquide, film absorbant anisotropiquement la lumière, et dispositif d'affichage à cristaux liquides
WO2011125622A1 (fr) 2010-03-31 2011-10-13 富士フイルム株式会社 Film anisotrope photoabsorbable, film polarisant, procédé de production du même, et dispositif d'affichage utilisant le même

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US20050105027A1 (en) * 2003-11-13 2005-05-19 Fuji Photo Film Co., Ltd. Optical compensation sheet, polarizing plate and liquid crystal display
US7567382B2 (en) * 2003-12-18 2009-07-28 Daishinku Corporation Optical filter
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WO2005064369A1 (fr) * 2003-12-25 2005-07-14 Fuji Photo Film Co., Ltd. Plaque polarisante et affichage a cristaux liquides
US7504139B2 (en) * 2003-12-26 2009-03-17 Fujifilm Corporation Optical cellulose acylate film, polarizing plate and liquid crystal display
JP4441283B2 (ja) * 2004-02-03 2010-03-31 日東電工株式会社 広視野角偏光板の製造方法
JP2005309364A (ja) * 2004-02-16 2005-11-04 Fuji Photo Film Co Ltd 光学補償フイルム、楕円偏光板及び液晶表示装置
JP4647315B2 (ja) * 2004-02-16 2011-03-09 富士フイルム株式会社 液晶表示装置
KR101181693B1 (ko) * 2004-06-29 2012-09-20 후지필름 가부시키가이샤 광학 셀룰로오스 아실레이트막, 편광판 및 액정 디스플레이
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JP2006064803A (ja) * 2004-08-25 2006-03-09 Konica Minolta Opto Inc 延伸セルロースエステルフィルム、それを用いた偏光板及び液晶表示装置
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JP2006113203A (ja) * 2004-10-13 2006-04-27 Nitto Denko Corp 積層光学フィルム、楕円偏光板および画像表示装置
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US20060115609A1 (en) * 2004-11-30 2006-06-01 Konica Minolta Opto, Inc. Polarizing plate and display using the same
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US20030218709A1 (en) 2003-11-27
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CN1209638C (zh) 2005-07-06

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